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The Nervous System

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by

Ana Karenina

on 26 June 2014

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Transcript of The Nervous System

The Nervous System
Acts as a central commander to the body.
Main Functions:
Gather and interpret information from the body and the outside.
Respond to the information given as needed.
Central Nervous System (CNS)
Peripheral Nervous System (PNS)
Processes and responds to all messages coming from the PNS.
Connects all parts of the body to the CNS, using nerves to carry the information.
Neuron
NEURON
is a nerve cell specialized on transferring messages in the form of electrical energy, called impulses.
Additional to organelles and nucleus, neurons have axons and dendrites.
Dendrites
are branched extensions that
receive
(impulses) information from other cells.
Axons
are elongated extensions that
carry away
the impulses, allowing information
to pass
to other cells.
Sensory Neurons
have receptors that detect changes inside and outside the body. And
send
the information to the CNS.
Motor Neurons
send impulses
from CNS to other systems
, responding by contracting.
CNS
is connected to the body by nerves.
Nerves
are a bunch of axons everywhere in your body.
PNS has two kind of nerves:
Somatic Nervous System: For voluntary movement that you can control.
Autonomic Nervous System: The involuntary actions that you cannot control (keep balance).
CNS receives information from sensory neurons, and responds by sending messages through motor neurons.
Nervous System Main Parts:
Brain:
Main control center of the nervous system.
Cerebrum:
Largest part of the brain where memories are stored, and controls voluntary movements. It divided in 2 hemispheres.
Cerebellum:
Process sensory information (skeletal, muscles and joints).
Medulla:
Connects brain with spinal cord. Controls the involuntary processes.
Spinal Cord:
Part of CNS, pass the impulses to and from the brain. It is surrounded by protective bones called vertebrates. Allows CNS to communicate with PNS.
Full transcript